Merge remote branch 'origin/bugfix/7735_label_units_not_saving'
Merge remote branch 'origin/feature/7656_speed_up_loadeventnexustest'
Merge remote-tracking branch 'origin/feature/7736_calibrate_pg3'
Re #7782. Use residentMem instead of availMem.

It *should* give about the same answer, but without the approximation
that nothing else on the system has changed.
Merge branch 'feature/7782_use_residentmem' into develop